Illustrator is NOT a general purpose PDF editor.
What reason do you have for working in InDesign if the file needs to be in Illustrator?
Illustrator does not support a direct one-to-one workflow relationship with InDesign files.
As stated already, there is no way to go from InDesign to Illustrator - and generally it should not be done.
There are legit cases when it can be done, so here's what I do.
You can export each layer to it's own PDF, then overlay those in Illustrator on similar layer names.
It's up to you if you want to Embed or Link them, but I'd be inclined to Link the PDFs.
If you need to edit the files in Illustrator then Embedding is the only way, once you File>Place and choose the PDF - it comes in as a link, there's an option at the top of the screen to Embed, which makes everything editable, and this can cause unforeseen issues, as Bob Stated, Illustrator is not a multi-purpose PDF editor.
Create it again in Illustrator from scratch, you have the bulk of the work done.
You can copy simple Vectors from InDesing to Illustrator.
You can export your InDesign file as RTF - which you can Place into Illustrator.
Let me know if you need anything else.
We are a large format printing company. Advertising agencies create files in InDesign. We have to open them in illustrator to set up the print for white ink and contour cutting.
I’ll get on my soapbox.
Well, then, this is your fault for not giving exact file spec and if you did, it’s on the customer for not reading them.
You can't open any non-Illustrator PDF in Illustrator without doing damage. But you can place and link it, you can't edit it.